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Finding the Fourth Proportional to 248.67, 342.96 and 155.34

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Solution

The fourth proportional to 248.67, 342.96 and 155.34 is: 214.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.67 : 342.96 = 155.34 : x
  2. Step 2: Convert to fraction form
    248.67/342.96 = 155.34/x
  3. Step 3: Cross multiply
    248.67x = 342.96 × 155.34
  4. Step 4: Simplify right side
    248.67x = 53,275.41
  5. Step 5: Solve for x
    x = 53,275.41/248.67
  6. Step 6: Final answer
    x = 214.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.